Low profile fireplace heat exchanger



FIG. 1 is a perspective view of a low profile fireplace heat exchanger showing our new design;

FIG. 2 is a plan view thereof;

FIG. 3 is a side elevational view, the opposite side being a mirror image thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof; and

FIG. 6 is a bottom view thereof. 

The ornamental design for a low profile fireplace heat exchanger, as shown and described. 